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December Weather in Gilly, Switzerland

Last updated: August 27, 2025

In Gilly, Switzerland, the average temperature in December hovers around 3°C (38°F). You might experience a minimum drop to -5°C (24°F) and a maximum rise to 12°C (55°F). Be prepared for considerable precipitation, with an average of 213 mm (8.4 in) spread over 19 days of the month, and expect high humidity levels averaging around 91%.

December Temperature in Gilly

In December in Gilly, the average temperature is 3°C (38°F). The maximum can reach 12°C (55°F), while the minimum can be as low as -5°C (24°F). It's advisable to pack warm clothing if you're planning to visit during this time.

December Weather in Gilly: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Gilly, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gilly, December typically has an average temperature of 3°C (38°F), with highs reaching up to 12°C (55°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec363943495463676660524338
Data source: Temperature data for Gilly generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Gilly

In Gilly, in December, the precipitation amount is 213 mm (8.4 in) over a period of 19 days.

December Precipitation Trends in Gilly

The chart displays monthly precipitation patterns in Gilly, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Gilly, December typically receives around 213 mm (8.4 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec127981406516312613012694121116213
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Gilly

In Gilly in December humidity is 91%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and necessitating layered clothing to stay warm and dry during your travels.

December Average Humidity in Gilly

This chart illustrates the average monthly humidity levels in Gilly, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Gilly is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%84%80%82%82%77%81%89%89%91%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Gilly

In Gilly in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Gilly, you can visit Hourly UV Index in Gilly.

Maximum UV Index Levels in Gilly for December

The chart shows the monthly maximum UV Index (UVI) for Gilly in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Gilly typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2367810987532
Data source: Gilly December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Gilly Compares to Other Months

Weather in Gilly varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Gilly, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Gilly, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)127 mm (5.0 inches)91%low
February Weather4°C (40°F)98 mm (3.9 inches)89%moderate
March Weather6°C (43°F)140 mm (5.5 inches)87%high
April Weather9°C (49°F)64 mm (2.5 inches)84%high
May Weather12°C (55°F)163 mm (6.4 inches)80%very high
June Weather17°C (64°F)126 mm (5.0 inches)82%very high
July Weather19°C (67°F)130 mm (5.1 inches)82%very high
August Weather19°C (66°F)126 mm (5.0 inches)77%very high
September Weather15°C (60°F)94 mm (3.7 inches)81%high
October Weather11°C (52°F)121 mm (4.8 inches)89%moderate
November Weather6°C (43°F)116 mm (4.6 inches)89%moderate
December Weather3°C (38°F)213 mm (8.4 inches)91%low

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